Induction Loops and Hearing Aids

Sennheiser offer several products which utilise a personal induction loop for audio transmission to a hearing aid. The hearing aid must be set to the 'T' position for this to work.

CURRENT PRODUCTS

The current products which offer these features are the EZT 3011 and EZT 3012 neck loops. These are usually paired with the EKI 830, RI 830 S and RR 840 S receivers.

These are designed to have a high output level suitable for driving most hearing aids. The receivers are either found as part of a personal audio solution at home, or as part of an installed audio system in venues like theatres, conference centres and schools.

Previous models which have been sold which offer these features are the RI 150 LL and RI 150 L receivers with integrated neck loop.

The RI 150 L was first developed before the introduction of digital hearing aids. Most of the older analogue hearing aids had a fairly strong reception of induction loops and the output level of the RI 150L was sufficient.

With the introduction of digital hearing aids, many of these were set by the audiologists with a lower level when used in the 'T' position as a way of conserving battery life. Unfortunately this meant the output level of the RI 150 L was too low for many digital hearing aids. We therefore introduced the RI 150 LL which had a more efficient loop system, which increased the output level significantly.

In many older installations, where the RI 150 L is still in use we receive reports of poor reception on digital hearing aids. We strongly recommend that these systems are upgraded to the newer EKI 830 + EZT 3011 combination. The transmission system in the venue does not need to be changed as they are fully compatible.